AUTOCAD 3 Construction and Editing Commands

8/12/2019 AUTOCAD 3 Construction and Editing Commands

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Setting the limits and units Type:

limits

-25000,-25000

25000,25000 This sets the drawing "size" to 50x50 metres.

Alternatively, select Format - Drawing Limits and then type the numbers

shown. To set the units to no decimal places, select Format Units. This dialogue box

will prompt out.

Select Decimal and set the precision for 0. Select also Decimal Degrees andprecision 0. Click OK.


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Zooming the Drawing

To reset the drawing view to the whole of the (empty) drawing,select the zoom-all icon.

It is hiding under the zoom-window icon (on the standardtoolbar). Hold the button down. Then rest of the zoom toolbar is displayed (or type: Z [space] A

[space] ). !!!!! [space] equivalent to

Move the cursor around now and note that the coordinates arenow bigger numbers!

Draw a rectangle using the coordinates from the drawing limits(this will provide a borderfor the drawing)!

Hide the axis label by selectingView - Display - UCS Icon -On.


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Layers

Layers are used to separate and structure drawings;Select Format - Layers..., AutoCAD will display the "Layer Properties Manager" dialog.

Click on the "New" button and then type CONSTThen click on the "Current" button to make this the current layer.Change the colour and then "OK" the dialog box.

Status

Name

Turn Lay ON/OFF

Freeze/Thaw layer Lock/Unlock Layer

Color

Line type

Line weight


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Construction lines

Select then line icon (or type L), and then type:

0,0

0,-17500

@3000,0

Select zoom-window (or type Z W ), enclosethe lines in the selection rectangle.

Select offset from the Modify toolbar (or type [the letter 'o']O ),

Then type: 250 the offset distance

Select the short horizontal line pick a spot anywhere above the lineselect the new line pick a spot anywhere above it.

terminate the command


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Drawing Copy , Rotate (Array) Select Modify - Array, AutoCAD will prompt a dialogue box.

1. Select all objects.2. Select Polar array.3. Select the center point.4. Total number of items i.e 25. Angle to fill i.e 22.5.6. Select rotate them as copied.7. Click OK.

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RESULTS


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Drawing Copy , Rotate (Array) Select Modify - Array, AutoCAD will prompt a dialogue box.

1. Select the objects2. Select Polar array.3. Select the center point. (0,0)4. Total number of items i.e 45. Angle to fill i.e 90.6. Select rotate them as copied.7. Click OK.

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RESULTS


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Fillet Command

The Fillet command is exceptionally useful. It basically extends twolines until they meet, and optionally, inserts a curve where the lines join.

To connect these lines select the fillet icon (or type F ), look at the command line area - if the current fillet radius

is NOT 0 (zero) - then type R

0 .

Select the first object . Then select the 2nd object.

Do to the rest.


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Mirror Command Select the Mirror icon from the Modify toolbar (or type MIRROR

),

Select objects and press

Select the first and 2nd point of axis line.

Then we have to select whether we want to erase the source or not.Select NO.

Do the MIRROR command until we get shape like this.


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Chamfered Command Draw a polygon with 12 sides.

Select the Chamfer icon from the Modify toolbar(or type CHAMFER ),

Type D and enter the distance of chamfer = 2500. Same goes to 2nd point.

Select the first and 2nd lines.

Do chamfer to the rest of corners.


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Trim Command The trim command is another command that you use very often. The first point

you specify selects the "cutting edge", that is, the line to which you aretrimming back to.

Select the trim icon from the Modify toolbar (or type TR ),

for the "cutting edge" select a "first point

press (to end the selection process), select the line to be trimmed ("second point");

press (to end the command).

Trim the rest of the lines.

TRIMMED


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Break Command Select the Break command from the Modify toolbar or

( type BREAK )

Select the object

Type F and specify the first breaking point.

Specify the second point.

Do for the rest of lines.


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Scaling Object Select icon Scale (or type SCALE )

Select objects

Specify the base point which is (0,0).

Select copy.

Specify the scale factor . 0.75 Select Move icon (or type MOVE )

Type P to go to the previous selection.

Move the original object.


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Create and Insert Block To view object information :

Start the list command. Select the outer rectangle. Press View the info.

To create a block . Click Make block . Enter the name. Under base point , click Pick Point. Click one point. Under Object select Object. Select the object.

Click OK. View the Object information.

To insert the block. Click Insert Block. Select the listed name. Place the object.


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Use Design Center On the Standard Annotation toolbar , click Design

Center.

Position and resize the DesignCenter.

Use objects from the DesignCenter.


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Use Tool Palettes

On the Standard Annotation toolbar, click ToolPalettes Window.

Select any tabs.

Select the object.

AUTOCAD 3 Construction and Editing Commands

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